<template>
  <div id="app">
    <el-container class="home-container">
      <!-- 头部header -->
      <el-header>
        <div>
          <img src="../assets/heima.png" alt />
          <span>电商后台管理系统</span>
        </div>
        <el-button @click="logout" type="info">退出</el-button>
      </el-header>
      <el-container>
        <!-- 侧边栏 -->
        <el-aside :width="isCollapse? '64px':'200px'">
          <div class="toggle-button" @click="toggleCollapse">|||</div>
          <!-- 侧边栏菜单 -->
          <el-menu
            background-color="#333744"
            text-color="#fff"
            active-text-color="#409EFF"
            :unique-opened="true"
            :collapse="isCollapse"
            :collapse-transition="false"
            :router="true"
            :default-active="activePath"
          >
          <!-- 一级菜单 -->
            <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id" >
              <!-- 一级菜单的模板区域 -->
              <template slot="title">
                <!-- 图标 -->
                <i :class="iconsObj[item.id]"></i>
                <!-- 文本 -->
                <span>{{ item.authName }}</span>
              </template>
              <!-- 二级菜单 -->
              <el-menu-item :index="'/' + subitem.path" v-for="subitem in item.children" :key="subitem.id" @click="saveNavState('/' + subitem.path)" >
                <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <!-- 文本 -->
                <span>{{ subitem.authName }}</span>
              </template>
              </el-menu-item>
            </el-submenu>
          </el-menu>
        </el-aside>
        <!-- 内容区 -->
        <el-main>
          <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
  </div>
</template>

<script>
export default {
  data(){
    return {
      menuList:[],
      iconsObj:{
        '125':"iconfont icon-users",
        '103':"iconfont icon-tijikongjian",
        '101':"iconfont icon-shangpin",
        '102':"iconfont icon-danju",
        '145':"iconfont icon-baobiao"
      },
      isCollapse:false,
      activePath: ""
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push('/login');
    },
    async getMenuList() {
      const { data: res } = await this.$http.get('menus');
      // console.log(res);
      if(res.meta.status !== 200) return this.$message.console.error(res.meta.msg);
      this.menuList = res.data;
      console.log(res.data);
    },
    toggleCollapse(){
      // 菜单的折叠和展开
      this.isCollapse = !this.isCollapse;
    },
    // 保存链接激活状态
    saveNavState(activePath){
      window.sessionStorage.setItem('activePath',activePath)
      this.activePath = activePath
    }
  },
};
</script>

<style lang="less" scoped>
.home-container {
  height: 100%;
}
.el-header {
  background-color: rgb(54, 61, 64);
  display: flex;
  justify-content: space-between;
  padding-left: 0px;
  align-items: center;
  color: #fff;
  font-size: 20px;
  > div {
    display: flex;
    align-items: center;
    span {
      margin-left: 15px;
    }
  }
}
.el-aside {
  background-color: #333744;
  .el-menu{
    border-right: none;
  }
}
.el-main {
  background-color: rgb(233, 237, 241);
}
.iconfont{
  margin-right: 20px;
}
.toggle-button{
  background-color: #4a5064;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em;
  cursor: pointer;
}
</style>
